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Surface Properties of Powder Mixed EDM of TaW Alloy Material

《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

Issue:
2008年01期
Page:
33-36
Research Field:
Publishing date:

Info

Title:
Surface Properties of Powder Mixed EDM of TaW Alloy Material
Author(s):
HU Fu-qiang1ZHANG Hong1WANG Zhen-long1ZHAO Wan-sheng2HU Ding1YU Yang1
1.School of Mechatronic Engineering,Harbin Institute of Technology,Harbin 150001,China;2.School of Mechanical Engineering,Shanghai Jiao Tong University,Shanghai 200030,China
Keywords:
TaW alloy material powder mixed electrical discharge machining surface properties
PACS:
TG661
DOI:
-
Abstract:
Two kinds of specimens made of a kind of TaW alloy material with high strength and high melting point about 3 000 ℃ are processed by a traditional EDM(Electrical Discharge Machining) and a powder mixed EDM separately,and its surface characteristics are tested.After processing,their surfaces have the roughness of 0.542 μm and 0.174 μm,and the modulus of elasticity of 280 GPa and 410 GPa,respectively.Moreover,the surface friction-resistance of the specimens are studied on a CJS111A friction and wear tester.The micro-appearances on the frictionized surfaces are observed and analyzed by using a SEM.The test results indicate that the better friction-resistance ability the specimen has,the higher wear rate the frictionized balls display in the test.The wear rates of frictionized ball corresponding to the two processed surfaces are 2.4×10-5 mm3/m for the traditional EDM and 1.4×10-4 mm3/m for the powder mixed EDM,which shows the latter is 5.8 times of the former.The results show that the powder mixed EDM is better at improving the surface properties of specimen than the traditional EDM,which means that the technique of powder mixed EDM has a great potential in processing the special material.

References:

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Last Update: 2012-12-05